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达芬奇椭圆仪
Author:
蔡永志
Topic:
Conic Sections
达芬奇椭圆仪
GeoGebra
New Resources
球体的体积推导（优化版）
漂亮的摇摆曲线
圓周公式的應用
平行線的斜率
【案例】2018年全国1卷理科12题
Discover Resources
angle between lines
分數與小數
圓錐截面曲線
橢圓的副本
直线倾斜角与斜率的副本
Discover Topics
Percentages
General Quadrilateral
Upper and Lower Sum or Riemann Sum
Derivative
Trapezoid